(12C Platinum) Cubic Equation

[Gamo]

Thanks Thomas Klemm

The build in Polynomial Solver work very good.

On Original 12C work well but
On 12C Platinum need to adjust guesses differently.
Your second example with two real roots.

First guess 5 R/S display 1
Second guess 0.5 R/S display 1

Remark: second guess needed to be 3 to get answer
For 1.8508

Can the guess be negative integer?
I try -1 and Error 5 shown.

Gamo